Truck for locomotives



(No Model.)

J. JOHNSTON.

TRUCK PoR LoeoMoTIvBs.

Patented Deo. 6, 1887.

N. PEIERS. Phan-Limusnpim. wan-hingen, D. t;

' UNITED STATES PATENT OFFICE.

JOHN JOHNSTON, OF JERSEY CITY, NEV JERSEY;

TRUCK FOR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 374,305, dated December6, 1887. Application mea Ju1y11,1es7. stl-ini No. 43.947, (No mode.)

To all whom it may concern:

Be it known that I, JOHN JOHNSTON, of Jersey City, in the county ofHudson and State of New Jersey, have invented an Improvement in Trucksfor Locomotive-Engines, of which the following is a specification.

Trucks for locomotive-engines have heretofore been constructed withcross-bars passing in front and behind a bearing-block, upon which theforward end of the boiler rests, and in which there is a cylindricalrecess receiving a similar projection below the boiler, so that thetruck may swivel at 'this place, and between the bearing-block and thecross-bars of the truck-frame there are inclined suspending-linkstwoatreach side-which allow the truck to move laterally as the engine runsaround a curve. A device of this general character as first employed maybe seen in Letters Patent No. 32,377, granted to A. F. Smith February11, 1862.

In trucks of this character there is a very heavy strainand wear uponthe joints of the links, it is difficult to lubricate the parts, andthedust lodging upon them increases the rapidity of wear, and in practiceit is found necessary to replace the links and the bolts veryfrequently, and in oase it becomes necessary to separate the truck fromthe locomotive, for repairs or otherwise, it can only be done by theremoval of six or eight nuts or bolts.

The object of my present invention is to distribute the weight over alarge area, so as to prevent the metal cutting under the weight andmotion, and to provide for separating the truck fronfthe bearing-blockwith facility.

In place of usingv the four suspending-links, I introduce two hookshaped suspendingplates extending from one cross-bar to the other, so asto obtain the largest surface possible for the weight to restupon, andat the same time the principal parts of the truck remain unchanged andthe efficiency is not injured.

- rIhe wheels A, axle B, side frames, C, springs D, and cross-barsE aresuch as are usually employed in locomotive-trucks, and these parts varyaccording to the character of the locomotive.

F is the bearing-block, havinga circular cavity, 2, at the central upperpart for the reception of the cylindrical projection below the forwardpart orflue-chamber ofthe boiler, and this bearing-block F has thedownwardly-projecting flanges and arms 3, as heretofore usual; butinstead of separate links being bolted to the four projecting ends ofthe arms, thesearms are connected by cylindrical bearings 4, either castwith or bolted tothe arms, so that these cylindrical bearings run foreand aft at the lower side portions of the bearing-block; It will beobserved that the bearing-block is between the transverse frames orcross-bars E, as usual; but instead of four links-two on each side--being bolted to these cross-bars E, I makeuse of two bolts, G-one oneach side-parallel to but closer together than the cylindrical bearings4, and the suspending-plates II are of a width corresponding to thedistance between the cross-bars E, and they are made with tubular eyes 8at the upper ends, through which the bolts G pass, and with hook-shapedlower ends, 9, that pass beneath and inclose these cylindrical bearings4 upon the bearingbloek F.

By the foregoing construction the truck' as a whole can turn or swivelat the cylindrical projection that enters the recess 2, and thetruck-frame can slide laterally, the cross-bars E moving in front andback of the bearingblock F, and in so doing the suspending-plates Hswing upon the bolts G, and the hooks 9 turn slightly upon thecylindrical bearings 4. The length of surface upon the bolts G and uponthe bearings 4 is so great that the weight of the locomotive isdistributed upon a large area, and the surfaces in contact do not cutinto each other, and it is easy to lubricate such surfaces by oilapplied upon the tops of the bearings 4, and also within oil-cups thatmay be applied at 10 upon the tubular bearings of the suspending-platesII; and when the truck-frame is to be separated from the bearing-blockit can be easily done by raising up IOO such bearing-block until thelower ends of the ings 4, and tubular eyes 8, extending from one Iosuspending-pi'ates unhook from the cylindrierosshzu to the other, andthe bolts G, which cal bearings 4. pass through the tubular eyes andcross-bars,

I daim as my invention.n substantially as set forth.

The c01nbnation,With the truek-frmnehav- Signed by me this 5th day ofJuly, 1887. ing the cross-bars E, and the bearing-block F, JOHNJOHNSTON. having cylindrical bearings 4 between such Vitnesses:cross-bars, of the suspending-plates H, hav- JOHN JELLY, ing hook-shapedlower ends, 9, for the hear- THOMAS S. JOHNSTON.

